Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2015, The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
Casey Dahlin | 80ada3d | 2015-10-20 20:33:56 -0700 | [diff] [blame] | 17 | #include <algorithm> |
| 18 | #include <iostream> |
| 19 | #include <iterator> |
| 20 | |
Elliott Hughes | 0a62067 | 2015-12-04 13:53:18 -0800 | [diff] [blame] | 21 | #include <android-base/strings.h> |
Casey Dahlin | 80ada3d | 2015-10-20 20:33:56 -0700 | [diff] [blame] | 22 | |
Christopher Wiley | c5442de | 2015-11-13 14:26:55 -0800 | [diff] [blame] | 23 | #include "os.h" |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 24 | #include "tests/test_util.h" |
| 25 | |
Casey Dahlin | 80ada3d | 2015-10-20 20:33:56 -0700 | [diff] [blame] | 26 | using android::base::Split; |
| 27 | using android::base::Join; |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 28 | using std::string; |
Casey Dahlin | 80ada3d | 2015-10-20 20:33:56 -0700 | [diff] [blame] | 29 | using std::vector; |
| 30 | using std::cout; |
| 31 | using std::endl; |
| 32 | using std::distance; |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 33 | |
| 34 | namespace android { |
| 35 | namespace aidl { |
| 36 | namespace test { |
| 37 | |
Christopher Wiley | c5442de | 2015-11-13 14:26:55 -0800 | [diff] [blame] | 38 | string CanonicalNameToPath(const char* package_class, const char* extension) { |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 39 | string rel_path{package_class}; |
| 40 | for (char& c : rel_path) { |
| 41 | if (c == '.') { |
Christopher Wiley | c5442de | 2015-11-13 14:26:55 -0800 | [diff] [blame] | 42 | c = OS_PATH_SEPARATOR; |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 43 | } |
| 44 | } |
| 45 | rel_path += extension; |
Christopher Wiley | c5442de | 2015-11-13 14:26:55 -0800 | [diff] [blame] | 46 | return rel_path; |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 47 | } |
| 48 | |
| 49 | void SplitPackageClass(const string& package_class, |
Christopher Wiley | c5442de | 2015-11-13 14:26:55 -0800 | [diff] [blame] | 50 | string* rel_path, |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 51 | string* package, |
| 52 | string* class_name) { |
| 53 | *package = string{package_class, 0, package_class.rfind('.')}; |
| 54 | *class_name = string{package_class, package_class.rfind('.') + 1}; |
| 55 | *rel_path = CanonicalNameToPath(package_class.c_str(), ".aidl"); |
| 56 | } |
| 57 | |
Casey Dahlin | 80ada3d | 2015-10-20 20:33:56 -0700 | [diff] [blame] | 58 | void PrintDiff(const string& a, const string& b) { |
| 59 | const int LEFT = 1; |
| 60 | const int UP = 2; |
| 61 | const int UP_LEFT = 4; |
| 62 | |
| 63 | auto a_lines = Split(a, "\n"); |
| 64 | auto b_lines = Split(b, "\n"); |
| 65 | |
| 66 | struct diff_table_entry { |
| 67 | size_t longest_common_subsequence_length; |
| 68 | int propagation_directions; |
| 69 | }; |
| 70 | |
| 71 | diff_table_entry table[a_lines.size() + 1][b_lines.size() + 1]; |
| 72 | |
| 73 | for (size_t i = 0; i < a_lines.size() + 1; ++i) { |
| 74 | for (size_t j = 0; j < b_lines.size() + 1; ++j) { |
| 75 | if (i == 0 || j == 0) { |
| 76 | int directions = 0; |
| 77 | |
| 78 | if (i) { |
| 79 | directions |= UP; |
| 80 | } |
| 81 | |
| 82 | if (j) { |
| 83 | directions |= LEFT; |
| 84 | } |
| 85 | |
| 86 | table[i][j].longest_common_subsequence_length = 0; |
| 87 | table[i][j].propagation_directions = directions; |
| 88 | } else if (a_lines[i-1] == b_lines[j-1]) { |
| 89 | table[i][j].longest_common_subsequence_length = |
| 90 | table[i-1][j-1].longest_common_subsequence_length + 1; |
| 91 | table[i][j].propagation_directions = UP_LEFT; |
| 92 | } else { |
| 93 | size_t length_up = table[i-1][j].longest_common_subsequence_length; |
| 94 | size_t length_left = table[i][j-1].longest_common_subsequence_length; |
| 95 | int directions = 0; |
| 96 | size_t length; |
| 97 | |
| 98 | if (length_up >= length_left) { |
| 99 | directions |= UP; |
| 100 | length = length_up; |
| 101 | } |
| 102 | |
| 103 | if (length_left >= length_up) { |
| 104 | directions |= LEFT; |
| 105 | length = length_left; |
| 106 | } |
| 107 | |
| 108 | table[i][j].longest_common_subsequence_length = length; |
| 109 | table[i][j].propagation_directions = directions; |
| 110 | } |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | size_t i = a_lines.size(); |
| 115 | size_t j = b_lines.size(); |
| 116 | vector<string> output; |
| 117 | |
| 118 | while (table[i][j].propagation_directions) { |
| 119 | if (table[i][j].propagation_directions & UP_LEFT) { |
| 120 | output.push_back(" " + a_lines[i-1]); |
| 121 | i--; |
| 122 | j--; |
| 123 | } else if (table[i][j].propagation_directions & UP) { |
| 124 | output.push_back("-" + a_lines[i-1]); |
| 125 | i--; |
| 126 | } else { |
| 127 | output.push_back("+" + b_lines[j-1]); |
| 128 | j--; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | int print_mask = 0; |
| 133 | bool printed_last = false; |
| 134 | size_t line_number = 0; |
| 135 | |
| 136 | for (auto it = output.crbegin(), frontier = output.crbegin(); |
| 137 | it != output.crend(); ++it) { |
| 138 | while (frontier != output.crend() && distance(it, frontier) <= 3) { |
| 139 | print_mask <<= 1; |
| 140 | print_mask &= 0x7f; |
| 141 | |
| 142 | if ((*frontier)[0] != ' ') { |
| 143 | print_mask |= 1; |
| 144 | } |
| 145 | |
| 146 | frontier++; |
| 147 | } |
| 148 | |
| 149 | if ((*it)[0] != '-') { |
| 150 | line_number++; |
| 151 | } |
| 152 | |
| 153 | if (print_mask) { |
| 154 | if (!printed_last) { |
| 155 | cout << "Line: " << line_number << endl; |
| 156 | } |
| 157 | |
| 158 | cout << *it << endl; |
| 159 | printed_last = true; |
| 160 | } else { |
| 161 | printed_last = false; |
| 162 | } |
| 163 | } |
| 164 | } |
| 165 | |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 166 | } // namespace test |
Christopher Wiley | ea6e382 | 2015-10-07 13:16:34 -0700 | [diff] [blame] | 167 | } // namespace aidl |
Steven Moreland | f4c64df | 2019-07-29 19:54:04 -0700 | [diff] [blame] | 168 | } // namespace android |